Combined lock and latch.



Patented 080.23, 1902.

J. B. COX.

COMBINED LOCK AND LATCH.

(Application filed Mar. 24, 1902.

(No Model.)

UNrrn STATES JAMES BURTON COX, OF CANTON, NEW YORK.

COMBINED LOOK AND'LATCH.

SPECIFICATION forming part of Letters Patent No. 716,671, dated December23,1902.

I Application filed March 24, 1902. derial No. 99,704. (No model.)

To aZZ whom it ntcty concern:

Be it known that L-JAMES BURTON COX, a citizen of the United States,residing at Canton, in the county of St. Lawrence and State of New York,have invented a new and useful Combined Lock and Latch, of which thefollowing is a specification.

This invention relates to a combined lock and latch.

The object of the invention is to present a simply-constructed,thoroughly efficient, durable, and inexpensive form of lock and latch inwhich the force of gravity shall be utilized for actuatingthe latch-boltin lieu of a spring, such as commonly employed.

A further object is to provide novel means for rendering the latch-keyinoperable for operating the locking-tumbler.

With these and other objects in view, as will appear as the nature ofthe invention is better understood, the same consists in the novelconstruction and combination of parts of a combined lock and latch, aswill be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, andin which like numerals of reference indicate corresponding parts, thereis illustrated a form of embodiment of the invention capable of carryingthe same into practical operation, it being understood that the elementstherein exhibited may be varied or changed as to shape, proportion, andexact manner of assemblage without departing from the spirit thereof.

In the drawings, Figure 1 is a view in front elevation of the combinedlock and latch in coactive relation with a door-frame, exhibiting thelocked position of the latch in full lines and its unlocked position indotted lines, the unlocked position of the lockingtumbler beingindicated in full lines and its locked-position in dotted lines. I Fig.2 is a view in transverse section through the lock, showing thetumbler-locking key in locked engagement with the tumbler toprevent itsbeing turned to'actuate thelatch bolt from the outside through themedium of an ordinary pass-key, indicated in dotted lines. Fig. 3 is aperspective detail view of the improved keeper. Fig. 4 is a perspectivedetail view of the tumbler-locking key detached. Fig. 5 is a detail viewin elevation of a plate with which the tu mbler-locking key coacts toefiect locking of the tumbler against rotation.

The lock constituting this invention is composed, generally stated, offour cooperative elements namel y, alatch-bolt 1,a latch-lifter 2,alocking-tumbler3, and a tumbler-locking key 4-these parts, with theexception of the tumbler-locking key, being housed in a suitable casing5 of the usual or any preferred construction. The lock herein shown isof the ordinary mortise type;'but it is to be understood that theimprovements herein defined are adapted for use in connect-ion with anoutside lock, and as thiswill be obvious detailed illustration thereofis deemed unnecessary.

The latch 1 is pivoted intermediate of its ends upon a pivot 6 vand iscounterweighted, the heavy extremity being at the forward end of thelatch, or that carrying the bolt 7. The rear end of the latch carries anarm or projection 8, constituting a bearing-surface to be engaged by themembers of the latchlifter carried bythe usual knob-spindle 9. Thesurfaces of the latch-lifter that coact with the bearing-surface 8 arerounded or curved to present cam-surfaces, which by impingement with thebearing-surface 'will effect lifting of the latch when the knob isturned in either direction, as will be obvious by reference to Figs. 1and 2. The under side of the bearing-surface 8 is provided adjacent tothe pivot 5 with a shoulder 10, adapted to form a stop to limit theinward movement of the locking-tumbler, which latter is associated witha spindle 11, the terminals of which work in suitable openings in theeasing members, as clearly shown in Fig. 2. On one side the spindle isprovided with one or more notches 12 to be engaged by the wards of anordinary latch or pass key 13, (indicated by dotted lines,) which uponbeing turned will move the tumbler into or out of engagement with thelatch. The key 13 herein shown is of the ordinary flat or Yale type andis adapted to engage the slot of a disk 14, suitably housed inaninward-extending tubular extension 15, carried by a faceplate 16, thesaid plate being provided with two inward-projecting tubular threadedextensions 17, engaged by screws 18, passing through a face-plate 19,secured to the inner side of the door. While generally it will bepreferred to employ these face-plates 16 and 19, it is to be understoodthatthe invention is not to be limited to their employment, as they maybe dispensed with and the disk 14 be associated with the lock-plates inthe usual manner. On the inner side of the door is arranged a disk 20,which may be either integral with the face-plate 19 or detachabletherefrom, and this disk is provided with a centrally-disposedorifice21, provided with oppositely-alined notches 22, designed to be engagedby lugs or projections 23 of the tumbler-locking key 4. when the latteris in the position shown in Fig. 2, the inner end of the key havingwards 24, adapted to engage recesses 25 in the inner face of the disk.The key is also provided with a lug or projection 26, disposed near itsinner end and designed to limit the outward movement of the key, theshank of the key engaging a slot formed in a disk 27, suitably housedfor rotary movement within the disk 20. When the lock is used as aday-latch, the locking-tumbler will be turned to the position shown infull lines in Fig. 1, thereby leaving the latch-bolt 1 free to berotated by the knobs. When it is to be used as a night-latch, thetumbler-locking key is moved outward to the position shown in dottedlines in Fig. 2, thereby freeing the notches 25 of the spindle from theWards 24 and permitting the locking-tongue to be turned from the outsideby the ordinary night-key. When it is desired positively to lock thelocking-tumbler against being raised from the outside by the useof thenight-key, the key 4 is pushed inward until its wards engage with therecesses of the spindle and the lugs 23 engage the notches 22 of thedisk 20, when it will be impossible to throw the locking-tumbler by theuse of an ordinary key, and as a solid wall of metal is interposedbetween the night-latch-key opening and the tumbler-locking key it willbe seen that without destroying the lock when the tumbler-locking key isonce positioned as shown in Fig. 2 it will be an utter impossibility topick the lock from without. In order to guard against accidental lockingof the spindle in the day-time, it is intended that the tumbler-lockingkey after having been moved outward to free it from engagement with thespindle shall be given a half-turn to bring the lugs 23 over the solidportion of the disk 20, as indicated by dotted lines in Fig. 5.

The keeper 28, which is secured to thejamb of the door in alinement withthe bolt 6, is provided with two recesses or slots 29 and 30, disposedat an angle to each other, the said keeper being a plate of metal andits construction beingsuch as to permit of its either being secured tothe right or left hand side of the jamb. The slot 30 occupiesapproximately a vertical position when the keeper is secured to thejamb, and the slot 29 is disposed at such an angle with relation theretothat its lower wall 31 by contact with the bolt 7 will lift the latchautomatically and allow the bolt to drop into the recess 30, and therebybe held securely locked in place.

It will be seen from the foregoing description that thelock ofthisinvention absolutely dispenses with the employment of springs forany purpose, the proper operation of the locking-latch being securedwholly through the agency of gravity. The lock is therefore renderedcertain and positive of operation and cannot get out of order unless theparts are strained by being tampered with. Moreover, by the simpleconstruction of the locking-tumbler certain and positive locking of thelatch may be effected, while the coaction therewith of thetumbler-locking key will render the lock absolutely burglar-proof.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is

1. In a lock, the combination with a latchbolt, of a locking-tumblertherefor adapted to be operated from the outside bya key, and areciprocatory key arranged on the inner side of the lock and adapted,when moved inward, to lock the tumbler against movewent from thelatch-key and-when moved outward to release the tumbler.

2. In a lock, the combination with a latchbolt and means for operatingthe same, of a locking-tumbler having a spindle provided at its outerend with means to be engaged by the wards of a latch-key to effectturning of the tumbler, a reciprocatory key disposed on the inner sideof the lock and having terminal wards to engage notchesin the inner endsof the spindle, and means for permanently associating the last-named keywith the lock.

3. In a lock, the combination with alatchbolt and means for operatingthe same, of a locking-tumbler having oppositely-projecting spindleseach provided with key-engaging means, and a reciprocatory keypermanently associated with the inner side of the lock-facing andprovided with means to in-' terlock with the spindle and the facing tohold the tumbler against turning.

4. In a lock, the combination with alatchbolt and means for operatingthe same, of a locking-tumbler having oppositely-projecting spindleseach provided with key-engaging means, a reciprocatory key permanentlyassociated with the inner side of the lock-casing and provided withmeans for locking the spindle against turning, and withlaterallyextending projections, anda disk on the lockcasing providedwith recesses to be engaged by the projections.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

JAMES BURTON COX.

Witnesses:-

' WORTH CHAMBERLAIN, E. J. CHAMBERLAIN.

